OBD Guide
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U1139

Invalid Or Missing Data For Primary Id

U1139 is an OBD-II diagnostic trouble code meaning: Invalid Or Missing Data For Primary Id. Common causes: damage to the can bus, oxidized or damaged connector contacts. Estimated repair cost: $11–167.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$11–167 (est.)

Symptoms

  • Unstable engine operation
  • Check Engine light comes on
  • Lost connection with diagnostic equipment
  • Incorrect operation of various vehicle systems

Causes

  • Damage to the CAN bus
  • Oxidized or damaged connector contacts
  • Malfunction of one of the control units
  • Software failure in ECU
  • Problems with power supply of electronic modules

How to Fix

  1. Check the integrity of the CAN bus
  2. Inspect and clean all connectors on associated modules
  3. Check power supply and ground of electronic modules
  4. Scan all modules for additional errors
  5. If necessary, reflash or replace the faulty control unit

Related codes

U1121U1131U1138U1140

FAQ

What does the U1139 code mean?

U1139 is an OBD-II diagnostic trouble code that indicates: Invalid Or Missing Data For Primary Id

What causes a U1139 error code?

The most common causes of U1139 include: Damage to the CAN bus; Oxidized or damaged connector contacts; Malfunction of one of the control units; Software failure in ECU.

How do I fix a U1139 diagnostic trouble code?

To fix U1139: Check the integrity of the CAN bus. Inspect and clean all connectors on associated modules. Check power supply and ground of electronic modules. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with U1139?

Limited driving only, diagnose soon

How much does it cost to fix U1139?

The estimated repair cost for U1139 is $11–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat